Display module and display device

Abstract

The application provides a display module and a display device. The display module comprises a display area and a non-display area arranged adjacently. The display module comprises a display panel, a polarizer, a light shielding layer and a cover plate. The polarizer and the cover plate are sequentially stacked on the light emitting side of the display panel. The light shielding layer is located in the non-display area and at least partially between the polarizer and the cover plate. The edge of the polarizer is projected onto the light shielding layer in the plane of the light shielding layer. The side of the cover plate facing the display panel has a plurality of grooves. The plurality of grooves are arranged in the direction from the display area to the non-display area. The plurality of grooves are projected onto the outside of the light shielding layer in the plane of the light shielding layer and on the side of the light shielding layer facing the display area. The grooves have the effect of uniformity, dispersion and atomization on light. Therefore, the display module and the display device provided by the application can alleviate the edge leakage of the polarizer, thereby improving the display effect of the display module and the display device.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display module and display device. Background Technology

[0002] Organic light-emitting diodes (OLEDs) are characterized by active light emission, high contrast, ultra-thinness, low temperature resistance, fast response speed, low power consumption, wide viewing angle, and strong shock resistance, which has led to their increasing use.

[0003] In related technologies, a display module may include a display panel, a polarizer, an optically clear adhesive (OCA), and a cover plate stacked in sequence. The polarizer can be used to reduce the reflection of ambient light, thereby improving the display effect of the display panel. The optical adhesive can be used to connect the polarizer and the cover plate. The cover plate is used to protect the display panel to prevent users from scratching the display panel when using it.

[0004] However, the edges of the polarizer in the aforementioned display module are easily observed by users, thus affecting the display effect of the display module and display device. Summary of the Invention

[0005] In view of at least one of the above-mentioned technical problems, embodiments of this application provide a display module and display device that can alleviate the edge leakage phenomenon of polarizers, thereby improving the display effect of the display module and display device.

[0006] To achieve the above objectives, the embodiments of this application provide the following technical solutions:

[0007] A first aspect of this application provides a display module, including adjacent display areas and non-display areas. The display module includes a display panel, a polarizer, a light-shielding layer, and a cover plate. The polarizer and the cover plate are stacked on the light-emitting side of the display panel, with the polarizer located between the display panel and the cover plate. The light-shielding layer is located in the non-display area and at least partially located between the polarizer and the cover plate. The orthographic projection of the edge of the polarizer onto the plane of the light-shielding layer is located within the light-shielding layer. The cover plate has a plurality of grooves on the side facing the display panel. The plurality of grooves are arranged along the direction from the display area to the non-display area. The orthographic projection of the plurality of grooves onto the plane of the light-shielding layer is located outside the light-shielding layer and on the side of the light-shielding layer facing the display area.

[0008] The display module provided in this application embodiment may include adjacent display areas and non-display areas. The display module includes a display panel, a polarizer, a light-shielding layer, and a cover plate. The polarizer and the cover plate are stacked on the light-emitting side of the display panel, with the polarizer located between the display panel and the cover plate. The light-shielding layer is located in the non-display area and at least partially between the polarizer and the cover plate. The orthographic projection of the edge of the polarizer onto the plane of the light-shielding layer is located within the light-shielding layer. The cover plate has multiple grooves on the side facing the display panel. These grooves are arranged along the direction from the display area to the non-display area. The orthographic projection of these grooves onto the plane of the light-shielding layer is located outside the light-shielding layer and on the side of the light-shielding layer facing the display area. Because multiple grooves are provided on the side of the cover plate facing the display panel, the interface between the connecting layer and the cover plate is uneven. When light passes through this uneven interface, the interface can uniformly disperse and atomize the light. The interface reflects some of the light in various directions, which helps the light to return to the polarizer and dissipate. This reduces the amount of light entering the cover plate from the interface, and thus reduces the amount of light emanating from the cover plate, thereby reducing the amount of light entering the user's eyes and alleviating the edge leakage phenomenon of the polarizer.

[0009] In one possible implementation, the display module includes a connecting layer located between the polarizer and the cover plate and in a recess, wherein at least a portion of the connecting layer covers the side of the light-shielding layer opposite to the cover plate.

[0010] It is possible to have at least a portion of the connecting layer on the side opposite to the display panel and the light-shielding layer on the side opposite to the display panel within the display area flush.

[0011] It is possible to have the refractive index of the connecting layer be less than or equal to the refractive index of the cover plate;

[0012] It is possible to have a refractive index of 1.47-1.51 for the connecting layer; and / or a refractive index of 1.45-1.7 for the cover plate.

[0013] It is possible to achieve a thickness range of 0.1mm-0.25mm for the connecting layer; and / or a thickness range of 8μm-25μm for the light-shielding layer.

[0014] This improves the overall flatness of the side of the light-shielding layer facing away from the display panel and the side of the connecting layer facing away from the display panel.

[0015] In one possible implementation, along the direction from the display area to the non-display area, the edge of the polarizer projected onto the plane of the light-shielding layer has a distance x between the edge of the light-shielding layer on the side closer to the display area, along the thickness direction of the display panel, the surface of the light-shielding layer on the side closer to the display panel has a distance t between the surface of the light-shielding layer on the side closer to the display panel and the surface of the connecting layer on the side closer to the display panel, the connecting layer has a refractive index n1, and the display module has a test viewing angle γ.

[0016] x, t, γ, and n1 satisfy the formula:

[0017] What can be achieved is that the range of the inspection angle is 45°-60°.

[0018] This prevents users from observing the edge-missing phenomenon of the polarizer within an angle range smaller than or equal to the inspection viewing angle.

[0019] In one possible implementation, along the direction from the display area to the non-display area, the groove wall includes a first groove wall and a second groove wall disposed opposite to each other. The first groove wall is located on the side of the second groove wall away from the display area. The end of the first groove wall away from the display panel is inclined in a direction closer to the display area, and the end of the second groove wall away from the display panel is inclined in a direction away from the display area.

[0020] In this way, the cross-sectional shape of the groove is relatively simple, which can reduce the difficulty of manufacturing the groove. In addition, the second groove wall can increase the exit angle of light from the cover plate, so as to avoid the user observing the edge leakage of the polarizer from the original viewing angle.

[0021] In one possible implementation, the connecting layer has a refractive index n1, and the display module has a viewing angle γ.

[0022] The first groove wall and the thickness direction of the display panel have an angle θ1, where θ1, γ, and n1 satisfy the formula:

[0023] And / or,

[0024] The second groove wall and the thickness direction of the display panel have an angle θ2, where θ2, γ, and n1 satisfy the formula:

[0025]

[0026] This helps to alleviate the edge leakage phenomenon of the polarizer.

[0027] In one possible implementation, along the direction from the non-display area to the display area, the angle between the second groove wall of each groove and the thickness direction of the display panel decreases or becomes equal in sequence.

[0028] In this way, as the included angles decrease sequentially, it is easier to achieve an included angle of less than 90° between the second groove wall of each groove and the light incident on the second groove wall. This helps to reduce or avoid the phenomenon of the polarizer missing edges when the user observes it at an angle less than or equal to the inspection angle. When all included angles are equal, the manufacturing difficulty can be reduced.

[0029] In one possible implementation, the non-display area includes a first non-display area and a second non-display area connected together. The second non-display area is located on the side of the first non-display area away from the display area. The light-shielding layer is located in the second non-display area and outside the first non-display area. The edge of the light-shielding layer near the display area coincides with the edge of the second non-display area near the display area.

[0030] In this way, the light-shielding layer and the display area are separated by the first non-display area, so as to prevent the light-shielding layer from entering the display area due to process errors and affecting the display effect of the display module.

[0031] In one possible implementation, the recess is located in the first non-display area;

[0032] And / or, the recess is located in the display area and is positioned close to the non-display area.

[0033] In this way, the grooves can be placed in a variety of locations, making them suitable for a wide range of scenarios.

[0034] In one possible implementation, along the direction from the display area to the non-display area, the edge of the polarizer has a first distance from the edge of the first non-display area near the edge of the second non-display area, and the edges on both sides of the first non-display area have a second distance.

[0035] The sum of the first distance and the second distance is in the range of 0.2mm-0.6mm; and / or, the range of the first distance is 0.05mm-0.4mm; and / or, the range of the second distance is 0.15mm-0.2mm.

[0036] This approach helps achieve a narrow bezel, alleviates edge leakage of the polarizer, and reduces the risk of the light-shielding layer entering the display area due to manufacturing process errors.

[0037] A second aspect of this application provides a display device including the display module described in the first aspect.

[0038] The display device provided in this application embodiment may include a display module, which may include adjacent display areas and non-display areas. The display module includes a display panel, a polarizer, a light-shielding layer, and a cover plate. The polarizer and the cover plate are sequentially stacked on the light-emitting side of the display panel. The light-shielding layer is located in the non-display area and is at least partially located between the polarizer and the cover plate. The orthogonal projection of the edge of the polarizer onto the plane of the light-shielding layer is located within the light-shielding layer. The cover plate has multiple grooves on the side facing the display panel. The multiple grooves are arranged along the direction from the display area to the non-display area. The orthogonal projection of the multiple grooves onto the plane of the light-shielding layer is located outside the light-shielding layer and on the side of the light-shielding layer facing the display area. Because multiple grooves are provided on the side of the cover plate facing the display panel, the interface between the connecting layer and the cover plate is uneven. When light passes through this uneven interface, the interface can uniformly disperse and atomize the light. The interface reflects some of the light in various directions, which helps the light to return to the polarizer and dissipate. This reduces the amount of light entering the cover plate from the interface, and thus reduces the amount of light emanating from the cover plate, thereby reducing the amount of light entering the user's eyes and alleviating the edge leakage phenomenon of the polarizer.

[0039] The structure of this application, as well as its other inventive objectives and beneficial effects, will become more apparent from the description of the preferred embodiments taken in conjunction with the accompanying drawings. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of a display module with a groove provided in an embodiment of this application;

[0042] Figure 2 This is a schematic diagram of the structure of the display module provided in the embodiments of this application when no groove is provided;

[0043] Figure 3 This is a partial structural diagram of the display module provided in the embodiments of this application when no groove is provided;

[0044] Figure 4 A partial structural diagram of a display module with a groove provided in an embodiment of this application;

[0045] Figure 5 This is another partial structural diagram of the display module provided in the embodiments of this application when it is provided with a groove.

[0046] Explanation of reference numerals in the attached figures:

[0047] 100: Display module; 100a: Display area;

[0048] 100b: Non-display area; 100c: First non-display area;

[0049] 100d: Second non-display area; 110: Display panel;

[0050] 111: First substrate; 112: Second substrate;

[0051] 120: Polarizing film; 130: Light-shielding layer;

[0052] 140: Cover plate; 141: Groove;

[0053] 1411: First tank wall; 1412: Second tank wall;

[0054] 150: Connecting layer; 151: Recess. Detailed Implementation

[0055] In related technologies, a display module may include a display panel, a polarizer, an optical adhesive, and a cover plate stacked sequentially. The display module may include a display area and a non-display area surrounding the display area. The screen-to-body ratio of the display module can be increased by reducing the width of the non-display area (i.e., a narrow bezel design for the display device), thus facilitating the realization of a full-screen display. In the non-display area, an ink layer may be disposed between the optical adhesive and the cover plate. This ink layer can be used to reduce light leakage and improve the display effect of the display module.

[0056] However, when the width of the non-display area is set too narrow, the width of the ink layer that can be placed in the non-display area is reduced. This reduces the overlap between the ink layer and the polarizer in the thickness direction of the display module, thus decreasing the ink layer's ability to block the edges of the polarizer. At certain viewing angles, users can easily observe the edges of the polarizer, resulting in edge-gap phenomena such as bright lines, discoloration, or uneven brightness at the edges of the display module. This affects the display effect of the display module and the display device, impacting the user experience.

[0057] In addition, to avoid the ink layer entering the display area due to process errors and affecting the display effect of the display module, the ink layer and the display area can be set at intervals in the extension direction parallel to the display module. That is, some non-display areas close to the display area may not have an ink layer, which further reduces the width of the non-display area where an ink layer can be set, further reduces the blocking effect of the ink layer on the edge of the polarizer, and makes it easier for the polarizer to leak edges.

[0058] To address at least one of the aforementioned technical problems, this application provides a display module and a display device. The display module may include adjacent display areas and non-display areas. The display module includes a display panel, a polarizer, a light-shielding layer, and a cover plate. The polarizer and cover plate are stacked on the light-emitting side of the display panel, with the polarizer located between the display panel and the cover plate. The light-shielding layer is located in the non-display area and at least partially between the polarizer and the cover plate. The orthographic projection of the edge of the polarizer onto the plane of the light-shielding layer is within the light-shielding layer. The cover plate has multiple grooves on the side facing the display panel. These grooves are arranged along the direction from the display area to the non-display area. The orthographic projection of these grooves onto the plane of the light-shielding layer is outside the light-shielding layer and located on the side of the light-shielding layer facing the display area. Because multiple grooves are provided on the side of the cover plate facing the display panel, the interface between the connecting layer and the cover plate is uneven. When light passes through this uneven interface, the interface can uniformly disperse and atomize the light. The interface reflects some of the light in various directions, which helps the light to return to the polarizer and dissipate. This reduces the amount of light entering the cover plate from the interface, and thus reduces the amount of light emanating from the cover plate, thereby reducing the amount of light entering the user's eyes and alleviating the edge leakage phenomenon of the polarizer.

[0059] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0060] The following will combine Figures 1-5 The display device provided in the embodiments of this application will be described.

[0061] This application provides a display device, which can be a mobile or fixed terminal such as electronic paper, mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, smart bracelet, smart watch, supercomputer, and navigator.

[0062] For example, the display device may include a display module 100, the display module 100 may include a display panel 110, and the display panel 110 may include components along the thickness direction (i.e., ...). Figure 1 The light-emitting side and backlight side are arranged opposite to each other in the direction Z) of the display module 100. The light-emitting side can be used to display images. The backlight side is the side opposite to the light-emitting side along the thickness direction of the display module 100. The light-emitting side can be... Figure 1 The upper side of the middle, the backlight side can be Figure 1 The lower side of the middle.

[0063] For example, the display panel 110 can be an organic light-emitting diode (OLED) display panel, a micro organic light-emitting diode (Micro OLED) display panel, a light-emitting diode (LED) display panel, a quantum dot light-emitting diode (QLED) display panel, a mini light-emitting diode (MiniLED) display panel, a micro light-emitting diode (Micro LED) display panel, or a liquid crystal display (LCD) display panel, etc.

[0064] Among them, see Figure 1 In an embodiment where the display panel 110 is a liquid crystal display panel, the display panel 110 may include a first substrate 111 and a second substrate 112. The first substrate 111 may be an array substrate, and the second substrate 112 may be a color filter substrate. A liquid crystal layer may be disposed between the first substrate 111 and the second substrate 112. In an embodiment where the display panel 110 is an OLED display panel, the first substrate 111 may be a light-emitting substrate, and the second substrate 112 may be an encapsulation substrate. For example, the encapsulation substrate may be formed using thin film encapsulation (TFE) technology.

[0065] See Figure 1 The display module 100 may include a first direction X, a second direction, and a third direction Z, all of which are different. The first direction X and the second direction can be any two different directions parallel to the display module 100, and the third direction Z can be any direction intersecting the display module 100. For example, the first direction X, the second direction, and the third direction Z can be perpendicular to each other. For example, the first direction X can be the width direction of the display module 100, the second direction can be the length direction of the display module 100, and the third direction Z can be the thickness direction of the display module 100. The length, width, and thickness in the embodiments of this application are merely for descriptive convenience and do not imply any limitation on the dimensions. For example, the width can be greater than, equal to, or less than the length.

[0066] See Figure 1The display module 100 may include a display area 100a and a non-display area 100b. The display area 100a can be used to display a screen, and the non-display area 100b can be arranged adjacent to the display area 100a. The non-display area 100b can be located on at least one side of the display area 100a. For example, the non-display area 100b can surround the outer perimeter of the display area 100a, and the non-display area 100b can form a "black border" around the outer perimeter of the display area 100a.

[0067] In some embodiments, see Figure 1 The display module 100 may include a cover plate 140, which may be located on the light-emitting side of the display panel 110 and may protect the display panel 110. For example, the display panel 110 and the cover plate 140 may be connected by a connecting layer 150, which may be formed of optically transparent adhesive.

[0068] For example, the thickness of the connecting layer 150 can range from 0.1mm to 0.25mm. This avoids poor step coverage due to excessively thin connecting layer 150, and also prevents poor flatness on the side of connecting layer 150 facing away from display panel 110 and the side of light-shielding layer 130 facing away from display panel 110. This improves the connection effect of connecting layer 150. Furthermore, it avoids excessively thick connecting layer 150, which would hinder the thinning of display panel 110. For example, the thickness of connecting layer 150 can be 0.1mm, 0.15mm, 0.2mm, 0.25mm, or any value between 0.1mm and 0.25mm.

[0069] In some embodiments, see Figure 1 The display module 100 may include a polarizer 120, which may be located on the light-emitting side of the display panel 110, for example, between the connecting layer 150 and the display panel 110. The polarizer 120 can be used to reduce the reflection of ambient light, thereby improving the display effect of the display panel 110. The polarizer 120 may completely cover the display area 100a and extend into the non-display area 100b.

[0070] In some embodiments, see Figure 1The display module 100 may include a light-shielding layer 130, which may be located in the non-display area 100b. The light-shielding layer 130 may be located on the side of the cover plate 140 facing the connecting layer 150, and at least a portion of the light-shielding layer 130 may be located between the cover plate 140 and the connecting layer 150, and at least a portion of the light-shielding layer 130 may be located between the polarizer 120 and the cover plate 140. For example, the light-shielding layer 130 may be located in the non-display area 100b and surrounding the display area 100a. The light-shielding layer 130 can help alleviate edge light leakage of the display module 100. The light-shielding layer 130 may include an ink layer.

[0071] For example, the thickness of the light-shielding layer 130 can be in the range of 8μm-25μm, thereby avoiding the light-shielding effect of the light-shielding layer 130 being too small, and also avoiding the light-shielding effect of the light-shielding layer 130 being too large, which would be detrimental to the thinning of the display panel 110. For example, the thickness of the light-shielding layer 130 can be 8μm, 10μm, 15μm, 18μm, 20μm, 22μm, 25μm, or any value between 8μm and 25μm.

[0072] For example, see Figure 1 At least part of the connecting layer 150 covers the side of the light-shielding layer 130 facing away from the cover plate 140. During the process of connecting the cover plate 140 and the polarizer 120 using the connecting layer 150, the connecting layer 150 can cover the step between the light-shielding layer 130 and the cover plate 140, and a recess 151 is formed at one end of the connecting layer 150 near the non-display area 100b. The recess 151 can be located on the side of the connecting layer 150 facing away from the display panel 110, and part of the light-shielding layer 130 can be located in the recess 151, thereby improving the overall flatness of the side of the light-shielding layer 130 facing away from the display panel 110 and the side of the connecting layer 150 facing away from the display panel 110. For example, at least a portion of the connecting layers 150 located in the display area 100a (i.e., the remaining connecting layers 150 excluding the connecting layers 150 corresponding to the recessed portion 151 and the groove 141) can be flush with the side of the light-shielding layer 130 facing away from the display panel 110, thereby making the cover plate 140 and the connecting layers 150 and the light-shielding layer 130 fit more tightly, providing a flat support surface for the cover plate 140, and also helping to improve the connection effect of the connecting layers 150.

[0073] For example, the refractive index of the connecting layer 150 can be less than or equal to the refractive index of the cover plate 140, thereby reducing the difficulty of material selection for both the connecting layer 150 and the cover plate 140. The refractive index of the connecting layer 150 can range from 1.47 to 1.51, for example, it can be 1.47, 1.48, 1.49, 1.50, 1.51, or any value between 1.47 and 1.51. The refractive index of the cover plate 140 can range from 1.45 to 1.7, for example, it can be 1.45, 1.51, 1.55, 1.60, 1.65, 1.70, or any value between 1.45 and 1.7.

[0074] For example, see Figure 1 The orthographic projection of the edge of the polarizer 120 onto the plane of the light-shielding layer 130 lies within the light-shielding layer 130, thus providing a certain degree of shielding effect on the edge of the polarizer 120 and reducing edge leakage of the polarizer 120. The connecting layer 150 can completely cover the polarizer 120, and the cover plate 140 can completely cover the connecting layer 150, thereby effectively connecting the polarizer 120 to the cover plate 140 through the connecting layer 150. This also prevents the edge of the polarizer 120 from warping due to not being connected to the cover plate 140. In addition, the larger area of ​​the cover plate 140 effectively protects the display module 100.

[0075] Understandably, with the narrow bezel design of the display module 100, the width of the light-shielding layer 130 located in the non-display area 100b is reduced, thus increasing the overlap width between the light-shielding layer 130 and the polarizer 120 in the thickness direction (i.e., Figure 1 The reduction of x) in the value of the light-shielding layer 130 reduces its ability to block the edge of the polarizer 120. Under certain viewing angles, users can easily observe the edge of the polarizer 120, resulting in edge leakage of the polarizer 120. This causes bright lines, discoloration, or uneven brightness at the edge of the display module 100, thus affecting the display effect of the display module 100 and the display device, and impacting the user experience.

[0076] For example, see Figure 1The non-display area may include a first non-display area 100c and a second non-display area 100d connected to each other. The second non-display area 100d may be located on the side of the first non-display area 100c away from the display area 100a. The light-shielding layer 130 may be located in the second non-display area 100d and outside the first non-display area 100c. The edge of the light-shielding layer 130 near the display area 100a coincides with the edge of the second non-display area 100d near the display area 100a. The edge of the polarizer 120 may be located in the second non-display area 100d, so that the polarizer 120 and the light-shielding layer 130 have an overlapping portion in the thickness direction. Due to errors in the manufacturing process, for example, if the manufacturing precision of the light-shielding layer 130 is low, the light-shielding layer 130 may enter the display area 100a due to manufacturing process errors, thus affecting the display effect of the display module 100. This is especially true in narrow bezel designs, where the light-shielding layer 130 is more likely to enter the display area 100a. Therefore, in this embodiment, the light-shielding layer 130 is not disposed in the first non-display area 100c. The first non-display area 100c separates the light-shielding layer 130 from the display area 100a, thus preventing the light-shielding layer 130 from entering the display area 100a due to process errors and affecting the display effect of the display module 100. However, when the light-shielding layer 130 is not disposed in the first non-display area 100c, the width of the light-shielding layer 130 located in the non-display area 100b will be further reduced, and the blocking effect of the light-shielding layer 130 on the edge of the polarizer 120 will be further reduced, making it easier for the polarizer 120 to have edge leakage.

[0077] Along the direction from the display area 100a to the non-display area 100b, the edge of the polarizer 120 has a first distance x with the edge of the first non-display area 100c near the edge of the second non-display area 100d. That is, the orthographic projection of the edge of the polarizer 120 onto the plane of the light-shielding layer 130 has a first distance x with the edge of the light-shielding layer 130 near the display area 100a. The edges on both sides of the first non-display area 100c have a second distance y. When the first distance x is larger, the overlap width of the polarizer 120 and the light-shielding layer 130 in the thickness direction is larger, and the light-shielding layer 130 has a better blocking effect on the polarizer 120. However, the larger the first distance x, the smaller the second distance y, making it easier for the light-shielding layer 130 to enter the display area 100a and affect the display effect of the display module 100. Therefore, it is necessary to reasonably balance the size of the first distance x and the second distance y.

[0078] For example, the sum of the first distance x and the second distance y can be in the range of 0.2mm-0.6mm. This avoids the sum of the first distance x and the second distance y being too small, resulting in a small first distance x and / or second distance y, thus preventing the light-shielding layer 130 from having a poor blocking effect on the polarizer 120 and / or the light-shielding layer 130 from entering the display area 100a and affecting the display effect of the display module 100. In addition, it can also avoid the sum of the first distance x and the second distance y being too large, thus preventing the bezel of the display device from being too large, which is not conducive to the thinness and high screen ratio of the display device. For example, the sum of the first distance x and the second distance y can be 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, or any value between 0.2mm and 0.6mm.

[0079] For example, the first distance x can be in the range of 0.05mm-0.4mm, thereby preventing the light-shielding layer 130 and the polarizer 120 from being in the same thickness direction (i.e., Figure 1 The overlap width in the direction Z) is too small to effectively block the edge of the polarizer 120, while also avoiding an excessive overlap width between the light-shielding layer 130 and the polarizer 120 in the thickness direction, which would be detrimental to achieving a narrow bezel. For example, the first distance x can be 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, or any value between 0.05mm and 0.4mm.

[0080] For example, the second distance y can be in the range of 0.15mm-0.2mm, thereby preventing the light-shielding layer 130 from being too close to the display area 100a, thus avoiding the light-shielding layer 130 entering the display area 100a and affecting the display effect of the display area 100a. In addition, it can also prevent the distance between the light-shielding layer 130 and the display area 100a from being too far, which would be detrimental to achieving a narrow bezel. For example, the range of the second distance y can be 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.20mm or any value between 0.15mm and 0.2mm.

[0081] The groove 141 on the cover plate 140 provided in the embodiments of this application will be described below.

[0082] Understandably, see Figure 2When ambient light or light emitted from the display panel 110 shines on the edge B of the polarizer 120, the edge B of the polarizer 120 reflects the light and enters the connecting layer 150. After passing through the connecting layer 150 and the cover plate 140, the light is emitted. If the emitted light enters the user's eyes, the user can observe the edge B of the polarizer 120. The edge B of the polarizer 120 is the edge of the side of the polarizer 120 facing away from the display panel 110.

[0083] In some embodiments, see Figure 1 The cover plate 140 may have a plurality of grooves 141 on the side facing the display panel 110. The plurality of grooves 141 are arranged along the direction from the display area 100a to the non-display area 100b. Along the direction parallel to the display panel 110, the orthographic projection of the plurality of grooves 141 on the plane of the light-shielding layer 130 is located outside the light-shielding layer 130 and on the side of the light-shielding layer 130 facing the display area 100a. Because multiple grooves 141 are provided on the side of the cover plate 140 facing the display panel 110, the interface between the connecting layer 150 and the cover plate 140 is uneven. When the light reflected from the edge B of the polarizer 120 passes through this uneven interface, the interface can uniformly disperse and atomize the light. The light is reflected in various directions through this interface, which helps the light to return to the polarizer 120 and dissipate. This reduces the amount of light entering the cover plate 140 from the interface, and thus reduces the amount of light emanating from the cover plate 140, thereby reducing the amount of light entering the user's eyes and alleviating the edge leakage phenomenon of the polarizer 120. The connecting layer 150 can be filled in the grooves 141.

[0084] For example, the groove 141 can be located in the first non-display area 100c, thereby alleviating the edge leakage phenomenon of the polarizer 120 and preventing the groove 141 from affecting the light emitted by the display panel 110 if it is located in the display area 100a. Alternatively, the groove 141 can be located in the display area 100a and close to the non-display area 100b, thereby alleviating the edge leakage phenomenon of the polarizer 120. Alternatively, the groove 141 can be located in both the first non-display area 100c and the side of the display area 100a close to the non-display area 100b, thereby increasing the coverage area of ​​the groove 141 and better alleviating the edge leakage phenomenon of the polarizer 120. The groove 141 can be located in at least one of the first non-display area 100c and the side of the display area 100a close to the non-display area 100b.

[0085] For example, the cross-sectional shape of the groove 141 along the thickness direction of the display module 100 may include a triangle, trapezoid, semicircle, other regular shapes, or irregular shapes. This embodiment uses a triangular cross-sectional shape for the groove 141 as an example. When the cross-sectional shape of the groove 141 is triangular, the cross-sectional shape is relatively simple, which can reduce the difficulty of manufacturing the groove 141. See also... Figure 1 and Figure 4 Along the direction from the display area 100a to the non-display area 100b, within the same groove 141, the groove wall of the groove 141 may include a first groove wall 1411 and a second groove wall 1412 disposed opposite to each other. The first groove wall 1411 may be located on the side of the second groove wall 1412 away from the display area 100a. The end of the first groove wall 1411 away from the display panel 110 is positioned closer to the display area 100a than the end of the first groove wall 1411 near the display panel 110, that is, the end of the first groove wall 1411 away from the display panel 110 is inclined towards the display area 100a. The end of the second groove wall 1412 away from the display panel 110 is inclined towards the direction away from the display area 100a.

[0086] Among them, see Figure 4 and Figure 5 The connecting layer 150 may have a refractive index n1, and the cover plate 140 may have a refractive index n2. Reflected light from the edge B of the polarizer 120 enters the connecting layer 150 and forms incident light BD and light ray BK. Light ray BD is precisely aligned with the edge C of the surface of the light-shielding layer 130 facing the display panel 110. Light ray BK is spaced apart from the edge C of the light-shielding layer 130 by other incident light rays. Light ray BD, after passing through the interface between the connecting layer 150 and the cover plate 140, forms refracted light ray DE. Light ray DE, after passing through the surface of the cover plate 140 facing away from the display panel 110, forms outgoing light ray EG. The light ray BD forms an angle α with the normal f1 perpendicular to the display module 100; the light ray BK forms an angle m with the normal f1 perpendicular to the display module 100; the light ray DE forms an angle β with the normal f2 perpendicular to the cover plate 140; the light ray EG forms an angle p with the normal f2; since the normal f1 is parallel to the normal f2, the light ray DE forms an angle β with the normal f1; the light ray BD forms an angle θ3 with the second groove wall 1412; the first groove wall 1411 forms an angle θ1 with the normal f1; and the second groove wall 1412 forms an angle θ2 with the normal f1. Along the thickness direction of the display panel 110, there is a distance t between the surface of the light-shielding layer 130 near the display panel 110 and the surface of the connecting layer 150 near the display panel 110. The distance t can be equal to the thickness of the connecting layer 150 minus the thickness of the light-shielding layer 130, which is also the thickness of the connecting layer 150 corresponding to the recess 151.

[0087] See Figure 5When the second groove wall 1412 serves as the incident surface of the light BD, it is rotated clockwise by an angle i (e.g., angle i can be 30°, 45°, or other angles) compared to the incident surface without the groove 141. Therefore, the normal f3 of the second groove wall 1412 is also rotated clockwise by an angle i compared to the normal f1 without the groove 141. When the normal rotates clockwise, the refracted light DE of the light BD after passing through the second groove wall 1412 will also rotate clockwise compared to the refracted light without the groove 141. This causes the outgoing light EG formed after passing through the second groove wall 1412 and the cover plate 140 to also rotate clockwise compared to the outgoing light formed without the groove 141. This increases the outgoing angle p of the light, thus preventing the user from observing the edge leakage phenomenon of the polarizer 120 at the original viewing angle (e.g., the original angle can be less than or equal to the inspection viewing angle γ, which will be explained in subsequent embodiments).

[0088] Figure 2 and Figure 3 This describes the light propagation path formed by the reflected light from the edge B of the polarizer 120 in the connecting layer 150 and the cover plate 140 when the groove 141 is not provided. The display module 100 is configured to have a test viewing angle γ, which can be the angle between the user's line of sight and the normal f2. When using the display module 100, the user typically views it at an angle smaller than the test viewing angle γ, not at an angle larger than the test viewing angle γ. That is, when the actual angle p of the outgoing light EG formed by the light reflected from the edge B of the polarizer 120 after passing through the connecting layer 150 and the cover plate 140 is greater than the test viewing angle γ, the user will not be able to observe the edge leakage phenomenon of the polarizer 120 within the range of the test viewing angle γ. The incident angle α of the light BD corresponding to the test viewing angle γ is the critical incident angle, and the first distance x corresponding to the critical incident angle can be the critical first distance x'. At this time, the user can just observe the edge leakage phenomenon of the polarizer 120 at the test viewing angle γ. When the actual first distance x is greater than or equal to the critical first distance x', the light-blocking layer 130 will block the light BD corresponding to the critical incident angle, thereby preventing the user from observing the edge leakage phenomenon of the polarizer 120 within an angle range smaller than the test viewing angle γ.

[0089] See also Figure 2 and Figure 3 According to the refractive index formula: since the light BD is refracted at the interface between the connecting layer 150 and the cover plate 140, n1*sinα=n2*sinβ; since the light is refracted on the side of the cover plate 140 away from the display panel 110, Sinγ=n2*sinβ.

[0090] From this, we can deduce that: n1*sinα=Sinγ;

[0091]

[0092]

[0093] because

[0094] From this, we can deduce in sequence...

[0095] In this embodiment of the application, the first distance x is greater than or equal to the critical first distance x', that is...

[0096] When x, t, γ, and n1 satisfy the above formula, the light-shielding layer 130 will block the light BD corresponding to the critical incident angle, thereby preventing the user from observing the edge leakage of the polarizer 120 within an angle range less than or equal to the test viewing angle γ. It is understood that in the embodiment with the groove 141, the edge leakage of the polarizer 120 can also be alleviated when the first distance x is greater than or equal to the critical first distance x'. It is understood that once the test viewing angle γ and the refractive index n1 of the connecting layer 150 are determined, the angle α between the light BD and the normal f1 perpendicular to the display module 100 is a constant value.

[0097] In one example, the refractive index n1 of the connecting layer 150 is 1.476, the refractive index n2 of the cover plate 140 is 1.51, the inspection angle γ is 45°, the thickness of the connecting layer 150 is 0.15 mm, the thickness of the light-shielding layer 130 is 0.015 mm, and the thickness of the cover plate 140 is 0.7 mm, i.e., t = 0.15 - 0.015 = 0.135 mm. This can be calculated as follows:

[0098]

[0099]

[0100] For example, the inspection viewing angle γ can be in the range of 45°-60°. This avoids the inspection viewing angle γ being too small, preventing the user from observing the edge of the polarizer 120 within a small viewing angle range, while also avoiding the inspection viewing angle γ being too large, thus preventing the first distance x from being too large, which is beneficial for narrow bezels. For example, the inspection viewing angle γ can be 45°, 47°, 50°, 53°, 55°, 58°, 60°, or any value between 45° and 60°.

[0101] For example, see Figure 4 and Figure 5The incident angle α of light BD is less than the incident angle m of light BK. This means that the angle α between the incident light BD formed by the reflected light from the edge B of polarizer 120 in the connecting layer 150 and the normal f1 is the smallest among all incident angles formed by the incident light and the normal f1. There is an angle θ1 between the first slot wall 1411 and the thickness direction (i.e., the normal f1) of the display panel 110. When the angle θ1 < α, the first slot wall 1411 deviates from the light BD in a direction away from the display area 100a relative to the light BD. Therefore, the first slot wall 1411 also deviates from the light BK in a direction away from the display area 100a relative to the light BK. This prevents the light BD and the light BK from illuminating the first slot wall 1411, but instead illuminates the second slot wall 1412. This increases the exit angle p of the light, thus preventing the user from observing the edge leakage phenomenon of polarizer 120 at the original viewing angle (e.g., the original angle can be less than or equal to the test viewing angle γ).

[0102] because It can be deduced that:

[0103] For example, see Figure 4 and Figure 5 The second slot wall 1412 and the display panel 110 have an angle θ2 between their thickness direction (i.e., normal f1). θ3 is the angle between the light ray BD and the second slot wall 1412. When θ3 is less than 90°, the refracted light ray DE formed after the light ray BD enters the cover plate 140 from the second slot wall 1412 deflects clockwise relative to the extension line DH of the light ray BD. This helps to increase the angle β between DE and the normal f2, thereby increasing the exit angle p between the exit light ray EG and the normal f2 of the cover plate 140. This helps the exit angle p to be greater than the inspection angle γ, thus reducing or avoiding the phenomenon of the polarizer 120 being observed by the user when it is less than or equal to the inspection viewing angle γ. Since θ3 = α + θ2, α + θ2 ≤ 90° can be set.

[0104] For example, see Figure 4 and Figure 5The angle m between the ray BK and the normal f1 gradually increases along the direction from the non-display area 100b to the display area 100a. Along this direction, the angle θ2 between the second groove wall 1412 of each groove 141 and the thickness direction of the display panel 110 can decrease sequentially, thus reducing m+θ2 (i.e., θ3). This makes it easier to achieve an angle θ3 between the second groove wall 1412 of each groove 141 and the ray BK less than 90°, which helps reduce or avoid the phenomenon of the polarizer 120 being observed by the user at a viewing angle γ less than or equal to the inspection angle γ. Alternatively, along the direction from the non-display area 100b to the display area 100a, the angle θ2 between the second groove wall 1412 of each groove 141 and the thickness direction of the display panel 110 can be uniform, thus reducing the manufacturing difficulty of the grooves 141.

[0105] It should be noted that the numerical values ​​and ranges involved in the embodiments of this application are approximate values. Due to the influence of the manufacturing process, there may be a certain range of errors, which can be considered negligible by those skilled in the art.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A display module, characterized in that, The display module includes an adjacent display area and a non-display area. The display module includes a display panel, a polarizer, a light-shielding layer, and a cover plate. The polarizer and the cover plate are stacked on the light-emitting side of the display panel, and the polarizer is located between the display panel and the cover plate. The light-shielding layer is located in the non-display area and is at least partially located between the polarizer and the cover plate. The orthographic projection of the edge of the polarizer on the plane of the light-shielding layer is located within the light-shielding layer. The cover plate has a plurality of grooves on the side facing the display panel. The plurality of grooves are arranged along the direction from the display area to the non-display area. The orthographic projection of the plurality of grooves on the plane of the light-shielding layer is located outside the light-shielding layer and on the side of the light-shielding layer facing the display area. The grooves are configured to disperse, atomize, and at least partially reflect light back into the polarizer to dissipate. Includes a connecting layer located between the polarizer and the cover plate, and located in the groove, wherein at least a portion of the connecting layer covers the side of the light-shielding layer opposite to the cover plate; Along the direction from the display area to the non-display area, the edge of the polarizer projected onto the plane of the light-shielding layer has a distance x between it and the edge of the light-shielding layer near the display area; along the thickness direction of the display panel, the surface of the light-shielding layer near the display panel has a distance t between it and the surface of the connecting layer near the display panel; the connecting layer has a refractive index n1; and the display module has a viewing angle γ. The x, t, γ, and n1 satisfy the formula: ; Along the direction from the display area to the non-display area, the groove wall includes a first groove wall and a second groove wall disposed opposite to each other. The first groove wall is located on the side of the second groove wall away from the display area. The end of the first groove wall away from the display panel is inclined toward the display area. The end of the second groove wall away from the display panel is inclined toward the display area. The first groove wall and the thickness direction of the display panel have an included angle θ1, where θ1, γ, and n1 satisfy the formula: ; and / or, The second groove wall and the thickness direction of the display panel have an angle θ2, where θ2, γ, and n1 satisfy the formula: 。 2. The display module according to claim 1, characterized in that, At least a portion of the connecting layer located within the display area has its side facing away from the display panel flush with the side of the light-shielding layer facing away from the display panel.

3. The display module according to claim 2, characterized in that, The refractive index of the connecting layer is less than or equal to the refractive index of the cover plate.

4. The display module according to claim 3, characterized in that, The refractive index of the connecting layer is in the range of 1.47-1.51; and / or the refractive index of the cover plate is in the range of 1.51-1.

7.

5. The display module according to claim 4, characterized in that, The thickness of the connecting layer ranges from 0.1 mm to 0.25 mm; and / or the thickness of the light-shielding layer ranges from 8 μm to 25 μm.

6. The display module according to claim 5, characterized in that, The range of the inspection angle is 45°-60°.

7. The display module according to claim 1, characterized in that, Along the direction from the non-display area to the display area, the angle between the second groove wall of each groove and the thickness direction of the display panel decreases or becomes equal in sequence.

8. The display module according to any one of claims 1-6, characterized in that, The non-display area includes a first non-display area and a second non-display area connected together. The second non-display area is located on the side of the first non-display area away from the display area. The light-shielding layer is located in the second non-display area and outside the first non-display area. The edge of the light-shielding layer near the display area coincides with the edge of the second non-display area near the display area.

9. The display module according to claim 8, characterized in that, The groove is located in the first non-display area; And / or, the groove is located in the display area and is positioned close to the non-display area.

10. The display module according to claim 8, characterized in that, Along the direction from the display area to the non-display area, there is a first distance between the edge of the polarizer and the edge of the first non-display area near the second non-display area, and there is a second distance between the edges of the two sides of the first non-display area; The sum of the first distance and the second distance is in the range of 0.2mm-0.6mm; and / or, the first distance is in the range of 0.05mm-0.4mm; and / or, the second distance is in the range of 0.15mm-0.2mm.

11. A display device, characterized in that, Includes the display module described in any one of claims 1-10 above.

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